Is Fluval Gro+ Safe For Shrimp? The Complete Guide

Keeping shrimp as pets is becoming increasingly popular among aquarium hobbyists Vibrant cherry shrimp and other colorful varieties brighten up any tank But there’s an important question when it comes to caring for shrimp – is Fluval Gro+ plant fertilizer safe to use?

I’ve done extensive research into this topic and want to provide a definitive guide on whether Fluval Gro+ can be used safely in tanks containing shrimp There are a few factors to consider so let’s dive right in

What is Fluval Gro+?

Fluval Gro+ is a liquid fertilizer produced by the well-known aquarium brand Fluval/Hagen. It’s designed to provide essential nutrients to freshwater aquarium plants to help them thrive.

The fertilizer contains macronutrients like nitrogen, phosphorus and potassium as well as micronutrients such as iron, manganese, and zinc. It does not contain copper, which is extremely toxic to invertebrates like shrimp.

Fluval markets Gro+ as a comprehensive all-in-one fertilizer that provides everything aquatic plants need for vigorous growth. They recommend dosing it 2-3 times per week.

Are the Ingredients Shrimp Safe?

When looking at any fertilizer product for a shrimp tank, it’s critical to assess each ingredient for shrimp safety. We’ll go through the main components one by one:

• Nitrogen – Shrimp are not sensitive to nitrogen. Moderate levels are fine.

• Phosphorus – Also safe in moderate concentrations. Helps shrimp molt their exoskeletons.

• Potassium – No issues here for shrimp health. Potassium is beneficial.

• Iron – Very important for shrimp and plants. Shrimp need iron to thrive.

• Manganese – Essential trace mineral that shrimp require in tiny amounts. Not toxic.

• Zinc – Likewise, zinc is needed by shrimp in small doses. No problems.

• Magnesium – Beneficial mineral for shrimp shells and enzyme functions.

• Boron – Boron deficiency is more likely than toxicity for shrimp. It supports metabolism.

• Molybdenum – Not toxic to invertebrates. Helps shrimp digest food.

The ingredients in Fluval Gro+ appear to all be shrimp safe based on extensive research into each one. There are no red flags for invertebrate toxicity.

What About Copper?

As mentioned earlier, copper is deadly to shrimp and other invertebrates, even in tiny concentrations. It interferes with their ability to uptake oxygen and molt properly.

The good news is Fluval Gro+ does not contain added copper. Many cheaper fertilizers include copper as a trace element, but Fluval wisely left it out of their formula due to shrimp safety concerns.

However, shrimp keepers should still be aware of potential copper contamination from other sources in an aquarium. Old tank decor, pipes or substrates can sometimes leach small amounts of copper over time.

Performing regular water tests to monitor copper levels is wise in any shrimp tank. Levels should always remain at 0 ppm.

Dosing Recommendations for Shrimp

Fluval recommends dosing 2-3 pumps of Gro+ per 50 gallons (200 L) two or three times per week. This amount is tailored for heavily planted tanks where maximum plant growth is the goal.

For shrimp aquariums, I suggest starting with a more conservative regimen of 1 pump per 20 gallons (75 L) once a week.

Watch your shrimp and plants closely for the first few weeks. If the shrimp seem fine and plants need more nutrients, slowly increase to 1 pump per 10 gallons.

But know that heavily dosing any fertilizer will necessitate more frequent water changes to keep nitrates and phosphates from escalating. And high nitrates can be problematic for sensitive shrimp over the long term.

Any Other Concerns?

There are a couple other factors shrimp keepers should consider when using Fluval Gro+ or any liquid fertilizer:

• Overdosing – An accidental large overdose could spike TDS, phosphates or nitrates to unsafe levels quickly. Always follow dosing directions carefully.

• Water Changes – Tap water may contain copper, so use a good water conditioner that binds metals. And remineralize RO or distilled water for shrimp.

• Compatibility – Don’t mix with medications containing copper compounds. Stop using if molting or mortality issues arise.

• Plants First – Fertilize only after plants are actively growing. Excess nutrients without plants can fuel algae.

• Test Regularly – Check TDS, GH, KH, nitrates and phosphates at least monthly to ensure water parameters are stable.

The Verdict on Fluval Gro+

After thoroughly evaluating all the ingredients, dosage considerations and potential precautions, I can comfortably say Fluval Gro+ appears to be safe for shrimp if used properly.

Start with a low dose once per week and closely observe your shrimp colony and aquarium plants. Providing just the right amount of fertilization encourages plant growth while keeping water quality high for healthy shrimp.

Always proceed with some caution when using ANY aquarium additives containing nutrients or chemicals. But overall, Fluval Gro+ seems to be one of the better fertilizer options for planted tanks with shrimp. Just dose conservatively and keep up with regular water testing and changes.